<template>
  <div class="tree-table">
    <el-table :data="formatData" :row-style="showRow" v-bind="$attrs">
      <el-table-column v-if="columns.length===0" width="150">
        <!--<template slot-scope="scope">-->
        <!--<span v-for="space in scope.row._level" :key="space" class="ms-tree-space"/>-->
        <!--<span v-if="iconShow(0,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">-->
        <!--<i v-if="!scope.row._expanded" class="el-icon-plus"/>-->
        <!--<i v-else class="el-icon-minus"/>-->
        <!--</span>-->
        <!--{{ scope.$index }}-->
        <!--</template>-->
      </el-table-column>
      <el-table-column v-for="(column, index) in columns" v-else :key="column.value" :label="column.text" :width="column.width">
        <template slot-scope="scope">
          <!-- Todo -->
          <!-- eslint-disable-next-line vue/no-confusing-v-for-v-if -->
          <span v-for="space in scope.row._level" v-if="index === 0" :key="space" class="ms-tree-space"/>
          <span v-if="iconShow(index,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded" class="el-icon-plus"/>
          <i v-else class="el-icon-minus"/>
        </span>
          {{ scope.row[column.value] }}
        </template>
      </el-table-column>
      <slot/>
    </el-table>
  </div>

</template>

<script>
  /**
   Auth: Lei.j1ang
   Created: 2018/1/19-13:59
   */
  import treeToArray from '@/page/test/index.js'
  export default {
    name: 'TreeTable',
    props: {
      /* eslint-disable */
      data: {
        type: [Array, Object],
        required: true
      },
      columns: {
        type: Array,
        default: () => []
      },
      evalFunc: Function,
      evalArgs: Array,
      expandAll: {
        type: Boolean,
        default: true
      }
    },
    computed: {
      // 格式化数据源
      formatData: function() {
        let tmp;
        console.log('`````````````')
        if (!Array.isArray(this.data)) {
          tmp = [this.data]
        } else {
          tmp = this.data
        }
        const func = this.evalFunc || treeToArray
        const args = this.evalArgs ? Array.concat([tmp, this.expandAll], this.evalArgs) : [tmp, this.expandAll]
        console.log(args)
        return func.apply(null, args)
      }
    },
    methods: {
      showRow: function(row) {
        const show = (row.row.parent ? (row.row.parent._expanded && row.row.parent._show) : true)
        row.row._show = show
        return show ? 'animation:treeTableShow 1s;-webkit-animation:treeTableShow 1s;' : 'display:none;'
      },
      // 切换下级是否展开
      toggleExpanded: function(trIndex) {
        const record = this.formatData[trIndex]
        record._expanded = !record._expanded
      },
      // 图标显示
      iconShow(index, record) {
        return (index === 0 && record.children && record.children.length > 0)
      }
    },
    mounted(){
        console.log(this.formatData)
    }
  }
</script>
<style rel="stylesheet/css">
  @keyframes treeTableShow {
    from {opacity: 0;}
    to {opacity: 1;}
  }
  @-webkit-keyframes treeTableShow {
    from {opacity: 0;}
    to {opacity: 1;}
  }
</style>

<style  scoped>
.tree-table  .ms-tree-space {
    position: relative;
    top: 1px;
    display: inline-block;
    font-style: normal;
    font-weight: 400;
    line-height: 1;
    width: 18px;
    height: 14px;

  }
 .tree-table .ms-tree-space:before {
    content: ""
  }
.tree-table .processContainer{
    width: 100%;
    height: 100%;
  }
.tree-table  table td {
    line-height: 26px;
  }

.tree-table  .tree-ctrl{
    position: relative;
    cursor: pointer;
    color: red;
    margin-left: -18px;
  }
</style>
